Warp stop-motion for looms.



A. E. RHOADES. WARP STOP MOTION FOR LOOMS. APPLICATION FILED APR. 29, 1911.

Patented Dec. 23, 1913.

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A. E. RHOADES. WARP STOP MOTION FOR LOOMS. APPLICATION FILED APR. 29, 1911.

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WARP STOP MOTION FOR LOOMS.

AIPLIOATIOH FILED APR. 29, 1911.

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ALONZO E. RI-IOADES, 0F HOPEDALE, IMASSACI-IUSETTS, ASSIGNOR TO DRAPER COMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

WARP STOP-MOTION FOR LOOMS.

Application filed April 29, 1911.

Specification of Letters Patent.

Patented Dec. 23, 1913.

Serial No. 624,120.

To all whom it may concern:

Be it known that I, .ALONZO E. Itnoanns, 0t Hopedale, in the county of lVorccster, in the State of Massachusetts, have invented certain new and useful Improvements in Warp Stop-Motions for Looms, of which the following is a specification.

The primary object of the present invention is to relieve the warp threads of the weight of the warp stop detectors of a warp stop motion to a substanital extent so as to minimize the drag of the warp threads upon the detectors. In the case of fragile and slack sized warp threads, the friction caused by the warp stop detectors results in warp breakage, thus involving unnecessary stoppage ot' the loom. Accordingly, the aim of the present invention is to reduce this friction.

In carrying out this main object, the warp stop detectors are made o't small size so as to reduce their weight, and they are also arranged in two banks so as to cooperate with the two planes of the warp threads made by the lease rods. The supports for the warp stop detectors and for the lease rods are arranged so as to facilitate their I removal from the loom when a fresh warp is to be drawn in and applied to the loom.

The present improvements are illustrated in the accompanying drawings, wherein Figure 1, is a side view of the warp stop motion and co-acting devices, enough only of the 100m being shown to enable the im- 1')10V6lll61'ltS to be understood. Fig. 2, is a plan View of the warp stop motion and the co-acting parts of the loom. Fig. 3, is a transverse vertical section in the plane iindicated by the line 3*3 in Fig. 2. Fig. 4i, is a rear view of a portion of the mechanism, the support for one end of the lease rods being shown in section. Fig. 5. is a detail View of one of the detectors. Fig. 6, is a detail section in the plane indicated by the line 0-6 in Fig. 3, and illustrating the removable mounting of one end of the supporting rods for the warp stop detectors.

In Fig. 1, a portion of the loom frame is shown in dotted lines. A, is the cam shattcarrying a earn a. which vibrates the feelers B, B, which feel for a warp stop detector when occupying an abnormal position due to the breaking or undue slackening of its warp thread. tween the cam and the feelers will be ex- The intervening connections be-' plained after the other characteristics have been described. The drawings illustrate the warp threads which feed forwardly in the direction indicated by the arrow b, as the cloth is woven. The warp threads are divided into two intersecting planes or sections by lease rods C. The warp stop detectors 1), are arranged in two banks which cooperate with the lower planes of the intersecting warp threads as shown in Fig. 3, being in this respect similar to the arrangement shown in reissued Letters Patent of Coldwell and Gildard, No. 11,023, July 30, 1901.

The detectors are made of [lat thin sheet metal approximately .008 of an inch in thickness. Each detector (Fig. 5) has a thread eye 0, through which one warp thread passes and a pivot hole (Z, through which loosely passes a supporting red I). There are two of the supporting rods I), one for each bank of detectors. Each detector is thus supported at bottom and top by its rod l), and by its warp thread. The arrangement is such that when the warp threads are intact the detectors stand at an angle so that the weight of each is borne partly by the warp thread, but prcponderalingly by the supporting rod. The delcctors are made as short as is consistent with the performance of their ollices, so that only a mininnnn weight is thread-supportcd. Each detector extcnds above its thread eye 0, only far enough to have the requisite strength and not tar enough to come in contact with the overlying warp threads. lonscqucntly, each thread comes in contact only with its own detector and is not subjected to any chafing action by reason of the other detectors either in its own bank or in the other bank. No part of one dctector can ever come in contact with a thread in the crossing warpplane, that is to say, with any threads passing through the bank of detectors to which it does not belong. llcnce, the friction on the warp thread due to the presence of the detectors is reduced to a minimum and hence the warp stop motion is adapted to be used with the finest, most fragile and least sized yarns. The detectors, by reason of their loose pivoting on the supporting rods E, are free to slide transversely of the loom (lengthwise oi the snppm'ting rods) thereby facilitating acccss to a fallen detector to relhrcad it, and to enable the organization to be used with varying numbers of warp threads.

By reason of the lightness of the detectors and their arrangement in two banks cooperating with the lower planes of the leased threads the warp stop motion can be used with warps having a large number of threads per inch.

In case thread breaks its detector drops into a position to obstruct the movement of the corresponding feeler B, as shown at the right in 3. Consequently, the detectors normally stand in an inclined position with their weights partly resting on the warp threads. In order to maintain the detectors in this normal inclined position two positioning bars F, are employed, one for each bank of detectors. Each positioning bar F, is located in advance of its bank of detectors so that the feeding strain on the warp threads causes the detectors to abut against it, as shown in Fig. 3. The positioning bars thus prevent the detectors from assuming a vertical position due to the advance of the warp threads, and maintain the two banks of inclined detectors in parallelism.

In case a warp thread breaks, its detector drops upon a fixed stop bar G, as shown at the right in Fig. 3. There are two of these stop bars G, one for each bank of detectors. These stop bars are preferably notched at their upper edges, as likewise are the lower edges of the feelers B, as illustrated and as common in the art, so as to avoid twisting the flat detectors under the feeling strain. lVhen one of the detectors drops it occupies an inclined position approximating the horizontal and lies at an angle to a vertical plane through its pivot bar and it is then in the path of the corresponding feeler Con sequently, the full movement of the feeler is obstructed and as the result the loom is stopped in a well-known way. In dropping from its normal position to its loom stopping position, each detector is required to swing through rather less than ninety degrees of are, so that it promptly gets to stopping position. All parts of a dropped detector are wholly out of the path of any of the warp threads.

The shafts H, of the feelers B, the supporting rods E, and the positioning bars F, are supported on a stationary frame I, secured to fixed brackets J, fastened to the two side frames of the loom.

Each of the lease rods C, is supported at each end by one end of a rocking lever K, pivotally mounted at its middle on a stud e, on the frame I, so that the lease rods may yield under the sway of the warp threads. A fixed central bar L, supported by the frame l, extends beneath the warp threads at the crossing of their leased planes, as shown in rig. 3, so as to reduce any tendency of the warp threads to sag under the weight of the detectors.

The supporting rods E, with the detectors D, strung thereon, are conveniently removed to facilitate drawing in and the placing of a fresh warp. Each supporting rod E, at each end rests in an open slot f, shown in Fig. 0, in a portion of the frame I, and is held in place therein by a removable pin 9. By withdrawing th pin 9', the supporting rod with the detectors strung thereon can be removed. These slots f, are rearwardly inclined, as shown in Fig. 3, so that there is no danger of the rods being displaced by the drag of the warp threads during weaving even if the pin 9, should be omitted. The lease rods are likewise easily removable. The end of each lease rod rests in a hole in one end of one of the levers K, and is prevented from endwise displacement by an external swinging gate M, pivoted at 71., to the lever K. When it is desired to remove a lease rod one of the corresponding gates M, is swung upwardly out of the way and the lease rod can then be removed by sliding it endwise. It is only necessary to slide lease rod far enough to release it from the hole in the opposite lever K, and then, when out of register therewith, it can be slid in the opposite direction far enough to free its unlocked other end. A leather bushing 2', is shown between the end of each lease rod and the hole in the lever K, in which it fits.

The feeler shafts H, H are vibrated in unison from the cam a. That cam acts upon a toe or follower, N, pivoted at j, to a burn ter-carrier K,wl1ieh coiperates with the loom stopping mechanism in a mannerwcll known in the art, a similar hunter-carrier, for example, being shown at A, in United States Letters Patent of Clement No. 6%,912, March 20, 1900. The toe N, is connected by a link 0, with an arm 1 which is loosely hung on a rock-shaft (33.. The toe N, is held against the cam 64 by a spring which is not shown since the arrangement is similar to that shown in the United States Letters Patent of Draper No. 797,6?1 August 22 1905. This arm P is yieldingly connected with the rock shaft Q, by means of a spring Z, (Fig. 2), and it has a projecting stud m, which, on the upstroke of the link 0, encounters a projecting stud n, of a collar 0, which is fast on said shaft Q, as in United States Letters Patent of Ambler, No. 885,130, April 21, 1908. The downpull of the link 0, acts through the spring Z, to rock the shaft Q3. Shaft Q, has a crank arm 7), connected by a link R, with a crank arm S, on the front feeler shaft H. At one extreme end said front feeler shaft H, has a crank arm T (Fig. 1) connected to a similar arm U, on the rear feeler shaft H, by a link V. Accordingly, the two feelers vibrate in unison.

In case a iteeler on its down stroke encounters a fallen detector, the spring Z, can yield thereby avoiding damage.

The mechanism between the banter-can rier K. and the loom stopping mechanism is not shown because constituting no part of the present invention. Such intervening mechanism can be employed as is shown in the atoresaid patent of Clement, No. 645,912. During the normal running oil. the loom, the cam av acts upon the follower N, thereby vibrating it in one direction, and a. spring (not shown, but similar to that described in the Draper Patent No. 797,671) moves the follower in the opposite direction. This vibration of the follower is communicated through the illustrated intervening mecha nism to the feelers B. In case, however, a detector drops and prevents the vibration of the feelers, the follower N can no longer be swung on its axis j by the cam a. On the contrary, the cam a when it then encounters the 'tollower N, does not vibrate the follower, but acts through the follower to lift the bunter-carricr iii, the connecting rod 0 then swinging about its upper pivot. This lifting of the buntercarrie!.' K swings a lever such as is shown in said ()lemcnt Patout, No. 645,919, and 'unships the usual shipper lover of the loom, thereby sto miug the loom in a well-known manner. Substantially no strain is brought upon the fallen obstructing detector.

The link V, connects the ends of the two leeler shafts ll, H, outside of the frame I, and has an upwardly projecting easily accessible handle by means of which both feelers can be simultaneously retracted thereby enabling fallen detectors to be con veniently hai'idled,

I claim 1. A warp stop motion for a loom having, in combination, a plurality of supporting rods extending transversely of the loom beneath the warp; a bank of thin sheet metal detectors loosely pivoted at their lower ends on each of said rods and transversely movable thereon and each detector having a threadeye at its upper end through which one of the warp threads )nsscs; and a positioning bar forward. of each bank of de teeters which maintains said detectors in an inclined position when the warp threads are intact, the forward teed ot' the warp threads bringii'ig the detectors against said positioning bar, and the several positioning bars maintaining the several. banks ol? inclined detectors in parallelism.

2. ll. warp stop motion for a loom having, in combination, a supporting rod extending transversely ot the loom beneath the warp; a bank of thin sheet metal detectors loosely pivoted at their lower ends on said rod and trans\ 'ersely movable therein, and each having a thread-eye at its upper end through which one of the warp threads passes; and a positioning bar :torward of said bank oil detectors which 1naintains said detectors in an inclined position when the warp thrards are intact, the :tor ward teed ot the warp threads bringing the detectors against said positioning bar.

3: A warp motion :tor a loom having, in combination, a supporting); rod extending transversely of the loom beneath the warp; a bank of thin sheet metal detectors pivoted at their lower ends on said rod and each having a thread-eye at its upper end through which one of the warp threads passes; and a positioning bar forward ol said bank of detcctors which maintains said detectors in an inclined position when the warp threads are intact, the :l'orward feed of the warp threads bringing the detectors against said positioning bar.

4t. A warp stop motion for looms comprising lease rods dividing the warp thr rads into two intersecting planes; two supporting rods extending transversely of the loom beneath the warp threads and at opposite sides of the intersection ol" said leased planes; and two parallel banks of thin sheet metal delcctors supported re u ectively by the lower crossing planes ol the warp threads between the lease rods and likewise by said rods, each detector being pivoted to one of said rods and having an eye at its upper end through which one oi the warp threads passes, no part of one detector ever emzonntering a thread in the crossing warp-plane.

A. warp stop motion for looms (annprising lease rods dividing the warp threads into two intersecting planes: two snpporting rods extending trzmsvcrsely oli the loon'i beneath the warp threads and at opposite sides oi. the intersection of said lcascd planes; and two parallel banks at thin sheet metal ('lctectors supported respectively by the lower crossing planes oi. the warp threads between the lease rods and likewise by said rods, each detector being pivoted to one 011' said rods and having an cyr at its upper end through which one o'l' the warp threads passes.

(S. A warp stop motion 'lor looms having, in combination, a supporting rod extending cross-wi.-' e oi the loom beneath the warp threads; a bank of thin sheet metal detectors, each o't which pivoted at its lower end to said supporting rod and having an eye at. its upper end through which one of the warp threads passes; a stationary stop bar back oli said supporting rod which supports the free end of a lallen detector, so that said :tallcn detector lies at an angle to a vertical plane; and a rising and falling viln-ating liecler which encounters ,said l'allen detector upon its downward movement.

7. A warp stop motion for looms having,

in combination, a supporting rod extending cross-wise of the loom beneath the warp threads; a bank of thin sheet metal detectors, each of which is pivoted at its lower end to said supporting rod and having an eye at its upper end through which one of the warp threads passes; a stationary stop bar back of said supporting rod which supports the free end of a fallen detector; and a rising and falling vibrating feeler which encounters said fallen detector upon its downward movement.

8. A warp stop motion for looms having, in combination, a bank of thin sheet metal detectors, each of which is pivoted at its lower end and is normally upheld by a warp thread; a stationary stop bar which supports a fallen detector, so that it lies at an angle to the vertical; and a rising and falling vibrating feeler which encounters said fallen detector upon its downward movement.

9. A warp stop motion for a loom having, in combination, lease rods dividing the warp threads into two intersecting planes; two removable supporting rods extending transversely of the loom beneath the warp and at opposite sides of the intersection of said leased planes; two banks of thin sheet metal detectors loosely pivoted at their lower ends on said respective rods and transversely movable thereon, and each having a thread eye at its upper end through which one of the warp threads passes, the two banks of detectors being supported respectively at their upper ends by the lower crossing planes of the warp threads; a permanent positioning bar forward of each bank of de tectors which maintains said detectors in an inclined position when the warp threads are intact, the forward feed. of the warp threads bringing the detectors against said position ing bar, and the two positioning bars main taining the two banks of inclined detectors in parallelism; a stationary stop bar back of each of said supporting rods which supports the free end of a fallen detector so that said fallen detector lies at an angle to a vertical plane; and a rising and falling vibrating feeder for each bank of detectors which upon its down stroke encounters a fallen detector.

10. A warp stop motion for a loom having, in combination, a plurality of removable supporting rods extending transversely of the loom beneath the warp; a plurality of banks of thin sheet metal detectors loosely pivoted at their lower ends on said respective rods and transversely movable thereon, and each having a thread-eye at its upper end through which one of the warp threads passes; a permanent positioning bar forward of each bank of detectors which main tains said detectors in an inclined position when the warp threads are intact, the forward feed of the warp threads bringing the detectors against said positioning bar, and the several positioning bars maintaining the several banks of inclined detectors in parallelism; a stationary stop bar back of each of said supporting rods which supports the free end of a fallen detector so that said fallen detector lies at an angle to a vertical plane; and a rising and falling vibrating feeler for each bank of detectors which upon its down stroke encounters a fallen detector.

11. A warp stop motion for a loom having, in combination a removable supporting rod extending transversely of the loom beneath the warp; thin sheet metal detectors loosely pivoted at their lower ends on said rod and transversely movable thereon, and each having a thread-eye at its upper end through which one of the warp threads passes; a permanent positioning bar forward of the detectors which maintains said detectors in an inclined position when the warp threads are intact, the forward feed of the warp threads bringing the detectors against said positioning bar; a stationary stop bar back of said supporting rod which supports the free end of a fallen detector so that said fallen detector lies at an angle to a vertical plane; and a rising and falling vibrating feeler which upon its down strok encounters a fallen detector.

In witness whereof, I have hereunto signed my name in the presence of two sul scribing witnesses.

ALONZO E. RHOADES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 6. 

